This fan mounting frame doe snot only decouple your fan, it also absorbs noise emissions. According to the manufacturer the noise emission from your fan may be reduced by as much as 9 dB(A).

Another innovative feature of this decoupling sleeve is the sealing function of the sleeve which directs the Airflow directly where you want it, making the fan more efficient.

This system is completely tool-free and can be reused without limitation.

Notes regarding installation:
Depending on the fan model and case used it may be easier to mount the sleeve on the case first and thereafter install the fan or other way around. If the mounting pin of the sleeve is not locked in plae properly it can be pulled from the other side to lock it into place.